Universal remote control system

ABSTRACT

A remote control adapted for use with a releasable readable media storage device. A readable media storage device having data and target indicators. Electrical contacts provide releasable connection with the remote control.

This application is a Continued U.S. patent application Ser. No.08/923,373 filed on Sep. 3, 1997 now U.S. Pat. No. 6,223,348, entitledUNIVERSAL REMOTE CONTROL SYSTEM, which is incorporated by reference inits entirety.

BACKGROUND OF THE INVENTION

The present invention is directed to a universal remote control systemwhich includes the use of a releasable readable media storage device,such as a Smart Card (herein referred to as “Smart Card” or “Card”), intransferring information and data to/from the remote control. A typicalreleasable readable media storage device is characterized as a devicewith a non-volatile memory and, in many cases, a microprocessor, whichcan be releasably mated with a reading device. For example, a Smart Cardincludes one or more chips (integrated circuits) that are imbedded inthe Card for receiving and storing information and data. Thisinformation and data can then be “read” from or “written” to the SmartCard.

Smart Cards are in wide spread use and can be broadly classified aseither contact, contactless or hybrid Cards. The contact type of Cardutilizes appropriate technology to establish a physical electricalcontact with an associated device which can read the information on theSmart Card. In the contactless type, the Card is passed over theappropriate technology to be powered by suitable inductive coils and theCard then sends a signal through capacitive plates. A hybrid type ofCard is a combination of the two foregoing types. While any of theforegoing types of Cards could be used in the present invention, thepreferred embodiment utilizes a contact type Card which connects to anassociated remote control, as will be described. Other types of readablemedia storage devices which can be used in the present invention includevirtually any type of releasable media storage device, and the inventionis not limited to the use of a Smart Card.

The present invention relates to a user-configurable universal remotecontrol having its device codes, that is the sets of code data needed tooperate various electronic devices, supplied from a releasable readablemedia storage device. In the preferred embodiment, this readable mediastorage device is a Smart Card. The universal remote control unit isprovided or sold to a particular user essentially “empty” of the codedata needed to configure the remote control to that user's television,video cassette recorder (“VCR”), cable box, Internet access device orother electronic device. The universal remote control is built with areader slot or port into which the user can insert separately purchased“device library” Cards which contain the sets of code data necessary toconfigure the remote control to operate all or some of those electronicdevices the user wishes to control. Additional sets of code data can beadded to the remote control any time the user obtains a new electronicdevice, up to the maximum capacity of the remote control, through theuse of additional Smart Cards.

The releasable readable media storage device, i.e., Smart Card, to beutilized in the present invention contains a compilation of the devicecodes suitable for use with a particular universal remote control, andallows a one time transfer of a single device code (i.e., the set ofcode data needed to remotely operate a particular electronic device)from the readable media storage device into the remote control's onboard, non-volatile memory. In the preferred embodiment, a Smart Cardconstructed of low cost material is utilized and is good for only oneuse. In one alternative embodiment, each Smart Card is designed for morethan one use. In another alternative embodiment, the universal remotecontrol system of the present invention is designed so thatinformation/data from the remote control can be downloaded into andremain stored in a releasable readable media storage device, e.g., acertain device code may be transferred from the remote control to aSmart Card. In a more complicated embodiment involving two-waycommunication between the remote control and an electronic device, theuniversal remote control of the subject invention contains an infraredreceiver for the purpose of receiving information from a television,computer or other electronic device and a means for transferring suchinformation into the memory of a readable media storage devicereleasably mateable with that remote control. In such an embodiment,information/data can be transferred from a user's electronic device tothe remote control to the readable media storage device, e.g. a videocoupon appearing on a television could be transferred from thetelevision to the remote control and then to a Smart Card for later usein a store or other shopping facility where the coupon could beredeemed.

In the preferred embodiment, to set up the universal remote control tooperate a particular electronic device, a Smart Card must be insertedinto a reader slot or port in the remote control. The location of thisreader slot can vary depending on the design requirements of aparticular universal remote control. Once the Card is inserted into thereader slot or port, the user is able to experiment with various devicecodes until he finds the one which will operate his electronic device.Once the user locks in a particular device code, that device code (i.e.,set of code data) is transferred into the remote control's non-volatilememory and the balance of the code data on the Card is either erased orblocked from further use.

Another application of the present invention is in the cable televisionindustry. Operators which provide cable or satellite television serviceto a number of subscriber's receiver sets are faced with the necessityof maintaining control of the service provided to each of the individualsets. Conversely, subscribers to such cable and satellite services eachhave individual needs and requirements as to the channels, features andfunctions available on and to their television sets. For example, acable or satellite service provider offers various types of services toits television subscribers and each subscriber normally has a choice ofselecting what channels and/or what programs he or she desires toreceive. Accordingly, a service provider must be able to provide thedesired service to each subscriber, and the provider must be able tokeep track and control over the type of service provided to eachsubscriber. A subscriber may also want to periodically change or varythe services or functions available on his or her set, or to addequipment to his or her entertainment system.

At present there are various ways for the service providers to track andmaintain control of such service, and various ways for the subscriber tochange the service he or she receives or the functions available to himor her. However, the known methods and apparatus for maintaining suchcontrol and/or making such changes are relatively expensive andcumbersome. The functions, services and equipment currently known arenot readily flexible to meet the individual subscriber's needs. Thepresent invention addresses these disadvantages of these known methodsand apparatus.

In the system, method and apparatus of the present invention, the user'sremote control unit has slots or ports for accommodating one or morereleasable readable media storage devices. The releasable readable mediastorage device of the present invention is utilized in a unique mannerwith the remote control to provide code data to the remote control andto provide control commands and programming data to the associatedelectronic devices, as will be described. In addition, the universalremote control system of the present invention can be utilized fortwo-way communication and used for home shopping, electronic banking,and pay-per-view movie purchase.

BACKGROUND ART

A patent of interest relative to the present invention is U.S. Pat. No.5,214,622 which discloses a television monitor including a remotecontrol. The remote control is provided with a slot into which memorycards are inserted. The remote control of U.S. Pat. No. 5,214,622 isadapted to use a memory card to provide information which can betransferred between the remote control and the display means. U.S. Pat.No. 5,214,622 is basically directed to providing a calendar timersuperimposed on the television display serving as a reference fordisplaying the information. The remote control also contains atransparent pressure sensitive pad covering a liquid crystal display forinputting hand written information, as well as the standardalpha-numerical and symbol keys for inputting remote control commandssuch as channel selection, volume control, etc.

Another patent of interest with respect to the present invention is U.S.Pat. No. 5,594,493 which discloses a Smart Card utilized with atelevision system. The Smart Card disclosed in U.S. Pat. No. 5,594,493has a photoelectric optical pick-up device embedded in the Card forreceiving and storing a signal from the television set. The stored datacan be subsequently displayed and read. The Card of U.S. Pat. No.5,594,493 is used to record data relating to product identification foruse in product promotion and sales. The Cards allow advertisers to makespecial offers of products to the Card holders for use within specificand varied time periods. The patent states that the Card affords anearly fail safe data transmission via standard computer and televisiontransmission methods.

SUMMARY OF INVENTION

The present invention relates to a user-configurable universal remotecontrol having its device codes, that is the sets of code data needed tooperate various electronic devices including Internet access devices,supplied from a releasable readable media storage device. (The system ofthe present invention can also be utilized with a dedicated remotecontrol wherein the code data needed to operate a particular electronicdevice is supplied to the dedicated remote control from a releasablereadable media storage device.) In the preferred embodiment, thisreadable media storage device is a Smart Card. The universal remotecontrol is provided or sold to a particular user essentially “empty” ofthe code data needed to configure the remote control to that user'stelevision, VCR, cable box, Internet access device or other electronicdevice. The universal remote control is built with a reader slot intowhich the user can insert separately purchased “device library” Cardswhich contain the sets of code data necessary to configure the remotecontrol to operate all or some of those electronic devices the userwishes to control. Additional sets of code data can be added to theremote control at any time the user obtains a new electronic device, upto the maximum capacity of the remote control, through the use ofadditional Smart Cards.

The releasable readable media storage device, i.e., Smart Card, to beutilized in the present invention contains a compilation of the devicecodes suitable for use with a particular universal remote control, andallows a one time transfer of a single device code (i.e., the set ofcode data needed to remotely operate a particular electronic device)from the readable media storage device into the remote control's onboard, non-volatile memory. In the preferred embodiment, a Smart Cardconstructed of low cost materials is utilized and is good for only oneuse. In one alternative embodiment, each Smart Card is designed for morethan one use. In another alternative embodiment, the universal remotecontrol system of the present invention is designed so that informationfrom the remote control can be downloaded into and remain stored in areleasable readable media storage device, e.g., a certain device codemay be transferred from the remote control to the releasable readablemedia storage device. In a more complicated embodiment involving two-waycommunication between the remote control and an electronic device, theuniversal remote control of the subject invention contains an infraredreceiver for the purpose of receiving information from a television,computer or other electronic device and a means for transferring andstoring such information in the memory of a readable media storagedevice releasably mateable with that remote control. In such anembodiment, information can therefore be transferred from a user'selectronic device to the remote control to the readable media storagedevice and stored in that device's memory for later use, e.g. a videocoupon appearing on a television could be transferred from thetelevision to the remote control and then to a Smart Card for later usein a store or other shopping facility where the coupon could beredeemed.

To set up the universal remote control to operate a particularelectronic device, a releasable readable media storage device, namely aSmart Card, must be inserted into a reader slot in the remote control.The location of this reader slot can vary depending on the designrequirements of a particular universal remote control. Once the Card isinserted into the reader slot, the user is able to experiment withvarious device codes until he finds the one which will operate hiselectronic device. Once the user locks in a particular device code, thatcode is transferred into the remote control's non-volatile memory andthe balance of the code data on the Card is either erased or blockedfrom further use using known techniques.

The foregoing system can be used with any electronic device and/or anyInternet access device utilizing a remote control. The releasablereadable media storage device will include code data for programming theremote control and can also include additional data for controlling thefunctions and features of the various electronic devices which arecontrollable by said remote control.

The foregoing features and advantages of the present invention will beapparent from the following more particular description of theinvention. The accompanying drawings, listed herein below, are useful inexplaining the invention.

DESCRIPTION OF DRAWINGS

FIG. 1 is a front view of a remote control including an internallymounted connector for receiving a releasable readable media storagedevice which is inserted in a slot opening to the side of the remotecontrol;

FIG. 2 is a side view of the remote control of FIG. 1;

FIG. 3 is a side view of a modification of the remote control of FIG. 1,wherein the connector is formed to be externally mounted on the remotecontrol; the Smart Card is inserted in a slot opening to the top of theremote control;

FIG. 4 shows a drawing of a Smart Card used in the present invention;

FIG. 5A is a schematic diagram of the Smart Card interface as in aremote control;

FIG. 5B is the schematic diagram of FIG. 5A with the addition of aninfrared receiver;

FIG. 6 is a flow chart of an operation of the Smart Card of theinvention;

FIG. 7 is a flow chart showing the logic implemented to permit the SmartCard and EEPROM interfaces to share common electrical connections;

FIG. 8 shows a series of steps of illustrating the concept of inputtingdata into an empty remote control; and

FIG. 9 shows a series of steps illustrating the concept of inputtingdata to enhance the functionality of the remote control.

FIG. 10 shows a series of steps illustrating an electronic transactionutilizing the present invention.

DESCRIPTION OF THE INVENTION

The present invention discloses new and unique uses for a systemincluding a universal remote control and a releasable readable mediastorage device. The releasable readable media storage device and remotecontrol of the present invention can also provide control for additionalequipment including Internet accessible devices. The present inventionalso enables the releasable readable media storage device to interactwith the remote control to vary, change and control the functions of atelevision receiver, cable box or satellite decoder receiving signalsfrom a service operator. Importantly each user can, by using theappropriate releasable readable media storage device, readily andconveniently configure his remote control to the desired functions,features and channels he obtains from the service operator.

FIGS. 1 and 2 show a remote control 11, generally patterned after socalled universal remote controls of suitable known type. In addition tothe standard components and circuitry, remote control 11 includes aconnector 12 for a releasable readable media storage device, a SmartCard 15 in the preferred embodiment, which selectively reads and writesto the remote control 11. Connector 12 comprises a slot or port 14 and asuitable known type socket for connecting to the Smart Card 15. Slot 14is molded directly into the case or body 16 of the remote control 11.Case 16 is preferably made of plastic material. In the embodiment shown,the slot 14 opens to the side of case 16. Slot or port 14 receives aSmart Card 15 shown in FIG. 4. Smart Card 15 is approximately 3.3×2.1inches in size.

Connector 12 can comprise a plurality of slots to accommodate or receiveone or more Smart Cards 15 which are inserted in respective slots in theconnector 12. However, in the preferred embodiment and also for purposesof clarity in the drawing, only one slot 14 is indicated. Additionalslots as needed may be formed in connector 12 parallel to slot 14 orelsewhere in the remote control 11.

The electrical and mechanical interface of Smart Card 15 with the remotecontrol 11 conforms to, and complies with, the international standardISO 7816 for integrated circuit cards which have an interface withelectrical contacts. Each slot 14 formed in connector 12 would have asimilar interface.

It should be clearly understood that, while the electrical andmechanical interface used in Smart Card 15 is in accordance with ISO7816 standards, in the preferred embodiment shown the software protocolsand data being transferred are unique to the present invention. However,in other applications, the protocol(s) and/or data transferred maycorrespond to a pre-existing standard format suited to that application,e.g. home banking as explained below.

FIG. 3 shows a modification 11A of the remote control 11 of FIGS. 1 and2. In the embodiment of FIG. 3, the connector 12A is formed essentiallyas a box externally of the case 16A and appropriately affixed to thecase 16A. In the embodiment of FIG. 3, the slot 12A opens upwardly, asindicated by the dotted lines in the Figure, and the Smart Card 15 isinserted into the slot 14A from the top of the remote control 11. Theoperation of the remote control 11 and the Smart Card 15 as depicted inFIG. 3 are the same as for the embodiment of FIGS. 1 and 2.

FIG. 5A shows the electronic circuitry 20 for the remote control 11 andthe Smart Card 15. The circuitry of FIG. 5A, and the operation of thecircuitry are well known, hence detailed description is not believednecessary. Microprocessor 26 may be of any suitable known type. Thekeypad 28 (which includes the various known television TV and VCRfunction keys depicted in FIG. 1) enables user inputs to microprocessor26. Referring to the lower left hand corner of FIG. 5A, the connector 12receives the Smart Card 15 and connects via leads 23 and 24 to theremote control 15 microprocessor 26. The connector 12 also suppliespower from the remote control batteries 33 to the chip on the Smart Cardvia connections 34 and 35. Additionally, a contact is provided withinconnector 12, attached to lead 36, which is used to notify themicroprocessor 26 that a Smart Card 15 has been inserted, as isdescribed in greater detail later in conjunction with the flowchart ofFIG. 6. The data in Smart Card 15 selectively control or alter thefunctionality of the microprocessor 26 in accordance with the dataprogrammed and stored in Smart Card 15. Microprocessor 26 can also writeto Card 15.

As will be explained herein below, the Smart Card technology of thepresent invention can be used to enable the remote control to altervarious configurable features and/or information in a remote control oron the controlled devices, such as a television set; and, the Smart Cardcan be used to add code data for different electronic devices to becontrolled by a universal remote control. FIG. 5B shows the electroniccircuitry of a remote control (as explained above with reference to FIG.5A) which includes an infrared receiving means 37.

The flowchart of FIG. 6 describes the operation of the Smart Card 15 andremote control 11 circuitry of FIGS. 5A and 5B. Initially, themicroprocessor 26 is in a “sleep,” or shut down mode in order tominimize power consumption and conserve battery life. Insertion of theSmart Card 15 into slot 14 closes a contact which, via transistor 29 andcapacitor 30, generates a pulse on the IRQ—(Interrupt Request) input pin31 of the microprocessor 26. Receipt of this signal causes themicroprocessor 26 to exit the previously described low power shut downstate and begin normal execution. First, the microprocessor 26 inspectsthe status of the keypad matrix 28 in order to determine if it was“woken up” by the user pressing a key. (If a keypress was the cause ofthe IRQ signal, the microprocessor 26 would then proceed to execute theindicated remote control function in the normal way.) In the embodimentdescribed in FIG. 6, however, the microprocessor 26 will determine thatno key has been pressed, as described in block 1 of FIG. 6. Initially,the first byte of data on the Smart Card 15 is read and evaluated todetermine if the Card 15 is of the correct type. If not, themicroprocessor 26 returns to its idle state, as described in block 4 ofFIG. 6. Next, the microprocessor 26 validates the memory block headerstored on the Smart Card 15. This header contains information indicatingwhere in the remote control's non-volatile memory the following SmartCard data bytes are to be stored, and for what purpose. If an invalidheader is detected, the microprocessor 26 signals the user (by, forexample, flashing the visible LED 32), and returns to the idle state, asdescribed in block 7 of FIG. 6. Once a valid block header has beenfound, the balance of the data in that block on the Smart Card 15 iscopied from the Smart Card 15 to the RAM memory 27 of the microprocessor26, and then from there to the designated target address within theremote control's non-volatile memory, as described in blocks 8 and 9 ofFIG. 6. On completion of this transfer, the microprocessor logicreturns, as described in block 5 of FIG. 6, to check for another datablock contained on the Smart Card 15. If one is found (as evidenced by asecond valid memory block header immediately flowing the end of thefirst data block), the transfer cycle is repeated. This processcontinues until no further valid data blocks are found, at which pointthe microprocessor 26 now checks the Card type previously acquired todetermine if the Smart Card 15 currently inserted in connector 12 is the“single use” type. If so, the microprocessor 26 writes data to thememory contained on the Smart Card 15 in order to erase or otherwisedisable future use of the Card 15, as described in blocks 10 and 11 ofFIG. 6. The microprocessor 26 then signals the user and returns to theidle state as described in block 7 of FIG. 6. In certain applications ofthe present invention, it may be desirable to provide additionalsecurity to the information and data stored on said Smart Card. Inconnection with such embodiments of the present invention, varioussecurity and encryption systems, including but not limited to arequirement that the user first activate the Smart Card through the useof a unique personal identification number (“PIN”) keyed in by the user,have been proposed or implemented and are well known in the art.

In the preferred embodiment shown in FIG. 5A, the Smart Card interfacesignals 23 and 24 are shared with those of the remote control'snon-volatile memory EEPROM 27. Since the Smart Card 15 and EEPROM 27have similar electrical interfaces, this allows common firmware code andmicroprocessor input/output pins to be used to communicate with bothdevices. Accordingly, a circuit and program logic must be provided toselect which device is active at which time. This is accomplished byconnecting an input/output port pin 38 on the microprocessor 26 in sucha manner that when it is in one state it disables the onboard EEPROM 27via its enable/disable pin 25 while simultaneously enabling output ofthe clock signal 24 to the Smart Card connector via transistor 39, whilein the other state it enables the onboard EEPROM 27 while disabling theclock output to the Smart Card connection. The flowchart of FIG. 7describes how this is accomplished by the firmware during the process ofreading data from the Smart Card 15, e.g. while performing the functionsshown in blocks 2, 5 and 8 of FIG. 6. The same process would beperformed by the firmware in order to select the Smart Card 15 as atarget to write data.

A basic concept of one embodiment of the present invention is to providea standardized remote control 11 with separately available code data foroperating different electronic devices. Various Smart Cards are madeavailable for VCRs, for televisions, for stereos, etc. Each Smart Card15 in the library has code data and programming to control differentfeatures, functions and equipment, such as on the television, the VCRand stereo in a user's home entertainment system.

In one embodiment, a user has a remote control 11 which is capable ofcontrolling six devices. Initially the user may acquire “device librarycards,” to thereby provide code data to control three of the sixpossible devices supported by the remote control 11. If the usersubsequently acquires a digital video disc (“DVD”), he can obtain theappropriate Smart Card for controlling the DVD via the remote control11.

In the embodiment described in FIG. 8, the remote control 11 isessentially empty of code data. A Smart Card is provided to enable andcontrol the features and equipment of the individual user. In thisembodiment, the remote control 11 is essentially passive and isactivated by a selected Smart Card 15. As depicted in FIG. 8, the userobtains and inserts the desired Smart Card into slot 12 of the remotecontrol 11. The user selects the device code that matches his equipmentto load the code data and programming for the selected functions andequipment into the remote control 11. Once the user locks in aparticular device code that code alone is transferred into the remotecontrol 11, and the Card may be erased or disabled.

The user separately acquires Smart Cards 15 to configure the remotecontrol 11 for exactly those items of service, equipment, or channels hewishes to control. New items, features, functions and equipment areadded at any time, up to the maximum capacity of the remote control 11.

FIG. 9 depicts a second embodiment in which the remote control 11 ispreloaded with code data for basic functions and/or equipment. To enablethe user to enhance his equipment, Smart Cards are made available thatallow purchase of additional function groups of the user's choice oroption such as PIP, menu, surround sound adjustments, etc. Also, theremote control 11 may be pre-loaded with a universal library for thebasic devices (televisions, VCRs, cable boxes) together with Cards toenable operation of individual additional equipment (DVD, satellite,etc.) as the user adds this equipment to his entertainment system.

The Smart Cards 15 can be designed to allow a single or one timetransfer of code data from the Smart Card into the onboard, non-volatilememory of the remote control 11. Since a Smart Card can be configured toprovide essentially a single use it may be fabricated of low-costmaterials to be relatively inexpensive. A one-time use capability of theSmart Card 15 acts as a validity and security check to assure that onlyauthorized devices or functions are controlled or changed by a SmartCard 15. After use, the Smart Card 15 may be discarded. In amodification of the foregoing embodiment, the Smart Card 15 is erasedafter entry of its input to the remote control 11, and thereafter the“blank” Smart Card 15 may be recorded and reprogrammed for further use.

By use of the Smart Card technology of the present invention the usercan conveniently add to the devices operated by his remote control 11and the capability of his cable system. For instance, during the hockeyseason the user can sign on to receive the desired various sportschannels for a limited time period. For such use, the cable providermails an updated Smart Card 15 to the user and the user inserts theSmart Card 15 into the remote to enable his or her system to receive thedesired sport channels for that limited period.

As stated above, remote controls 11 are fabricated with features thatare enabled or disabled, and various built-in features may be enabled ordisabled via Smart Card 15 loaded information. For the cable/satelliteservice provider, this means that they can selectively enable/disablevarious buttons or functions on the remote control 11, depending on whatthe individual customer has requested. Further this allows a distinctpricing of individual features such as sleep timer, time delay macroplayback, favorite channel scan etc.

The Smart Card 15 can be updated to reflect changes in channel line up.A cable or satellite service provider who offers direct channel accesskeys on its remote control could simply mail an inexpensive Smart Card15 out to all users whenever the channel line up changes. Thus, theSmart Card 15 becomes the means for delivery of upgraded subscriptioninformation, and can be used to modify a customer's service and updatethe remote control 11 as well.

Since the remote control 11 can transfer data into a Smart Card 15,Smart Cards are provided that limit access to a particular feature ortelevision program, e.g. five pay-per view movies, monthly or specialsport coverage, etc. The Smart Card 15 can, in effect, provide a creditcard type of transaction. The remote control 11 is coded to send aparticular control signal to the receiver a pre-set number of times, andcan specify the data to send. The remote control 11 updates anddecrements the authorized number in the Smart Card 15 each time thefeature is used, and terminates when the count reaches zero.Alternatively, the remote control 11 can load the counter updatedinformation from the Smart Card 15 into its own internal storage andoperated therefrom. In this latter case, after transfer of theinformation, the Smart Card 15 is erased or disabled, and the card canbe discarded.

Another significant use for Smart Card system of the present inventionis to limit access to programs of different viewer rating. For example,children in a household have a Smart Card 15 that permits them to viewselected programs on the cable system, or to access limited sites on theInternet. In contrast, the parents have Smart Cards with a broaderchoice of TV programs and/or an unrestricted access to the Internet.

The flowchart in FIG. 10 depicts another type of operation of the SmartCard 15, when used in a remote control 11 with electronic circuitry suchas in shown in FIG. 5B, which includes an infrared receiver 37 inaddition to the usual infrared transmitter. The addition of an infraredreceiver 37 enables the microprocessor in the remote control 11 toengage in bidirectional communication with other devices such as a cablebox, DBS receiver, Internet access device or specialized terminal device(referred to hereafter as “base unit”). There are many different methodsand techniques for formatting and modulating data for transmission viainfrared or other medium, all of which are well known and are hence notdescribed here. It will also be appreciated that although the preferredembodiment uses infrared to implement this bi-directional communication,similar results could be obtained using other transmission technologiessuch as radio frequency, ultrasonic, etc.

The Smart Card transaction is initiated by insertion of the Card 15 inthe same way as previously described in conjunction with the flowchartof FIG. 6. This is described in blocks 1 through 4 of FIG. 10. Once themicroprocessor 26 has determined that the card type is “interactive” itenters a loop in which it successively checks for user keyboard 28 input(block 5), checks the infrared receiver 37 for data from the base unit(blocks 6 and 7), verifies that the Smart Card 15 is still inserted inthe slot 14 (block 15), and repeats this sequence until either the card15 is removed (at which point it returns to the idle state) or a commandmessage is received from the base unit. The objective of this process isto allow the user of the remote control 11 to initiate a transactionwith the base unit by keying in data on the remote control (for examplea menu selection, a PIN, or some other information). Once the base unithas determined that a valid transaction is to occur, it then transmits acommand to the remote control 11 to access data on the Smart Card 15,such as a cash balance, a pay-per-view movie credit, etc. This series ofevents are shown in the subsequent portion of the flowchart. At block 9of FIG. 10, the remote control 11 examines the response command from thebase unit. If it is “transaction complete,” the remote control 11signals the user (block 8) and returns to the idle state. If theresponse command is not “transaction complete,” the remote control 11then determines if the response is a command to read or to write SmartCard data (block 10), what location in the Smart Card's memory is to beaccessed, and acts accordingly (blocks 11 and 12). If the command was a“write,” the remote control 11 then signals completion to the base unit(block 14). After executing the read or write function, the remotecontrol 11 returns to the original state (block 5) awaiting furtheraction by the user or base unit. A typical transaction might consist ofseveral of these sequences as, for example, the base unit first reads anaccount balance from the Smart Card 15, then interacts with the user tofinalize a purchase, and finally debits the account balance and writesthe updated value back to the Smart Card memory.

It will also be appreciated from the foregoing descriptions and theflowcharts of FIGS. 6 and 10, since the Smart Card type and function isidentified in the data stored on the Card, that a single Smart Card canserve more than one purpose. Furthermore, these are not necessarilylimited to only remote control applications. For example, a single SmartCard could contain data to both enable new subscription channels on acable box or DBS receiver via that base units own Smart Card reader, anddata to update the remote control functionality to enable access to thatchannel.

While the invention has been particularly shown and described withreference to a particular embodiment thereof it will be understood bythose skilled in the art that various changes in form and detail may bemade therein without departing from the spirit and scope of theinvention.

1. A system comprising: a releasable media device; and a hand-held unitfor commanding operations of one or more home appliances comprising amicroprocessor; a port in communication with the microprocessor in whichthe releasable media device is positionable, the port allowing themicroprocessor to read data from the releasable media device; and amemory in communication with the microprocessor; wherein the releasablemedia and the memory have a similar electrical interface which allowscommon pins of the microprocessor to be used to communicate with boththe releasable media device and the memory and wherein themicroprocessor comprises an input/output pin used to enable an outputclock signal of the releasable media device and programing for togglingthe input/output pin between a first state and a second state to enableand disable the releasable media device, respectively.
 2. A remotecontrol for commanding operations of one or more home appliances adaptedfor use with a releasable media device, comprising: a microprocessor; aport in communication with the microprocessor in which the releasablemedia device is positionable, the port allowing the microprocessor toread data from the releasable media device; and a memory incommunication with the microprocessor; wherein the releasable media andthe memory have a similar electrical interface which allows common pinsof the microprocessor to be used to communicate with both the releasablemedia device and the memory and wherein the microprocessor comprises aninput/output pin used to enable an output clock signal of the releasablemedia device and programming for toggling the input/output pin between afirst state and a second state to enable and disable the releasablemedia device, respectively.